/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.beans.metadata.plugins;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import org.jboss.beans.info.spi.BeanInfo;
import org.jboss.beans.metadata.spi.ValueMetaData;
import org.jboss.joinpoint.spi.Joinpoint;
import org.jboss.reflect.spi.ClassInfo;
import org.jboss.reflect.spi.TypeInfo;
import org.jboss.util.JBossObject;
import org.jboss.util.JBossStringBuilder;
/**
* Collection metadata.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 1.11 $
*/
public class AbstractCollectionMetaData extends AbstractTypeMetaData implements Collection
{
/** The collection */
protected ArrayList collection = new ArrayList();
/** The element type */
protected String elementType;
/**
* Create a new collection value
*/
public AbstractCollectionMetaData()
{
}
/**
* Get the element type
*
* @return the element type
*/
public String getElementType()
{
return elementType;
}
/**
* Set the element type
*
* @param elementType the element type
*/
public void setElementType(String elementType)
{
this.elementType = elementType;
}
public Object getValue(TypeInfo info, ClassLoader cl) throws Throwable
{
Collection result = (Collection) getCollectionInstance(info, cl, Collection.class);
if (result == null)
result = (Collection) getDefaultCollectionInstance();
TypeInfo elementTypeInfo = getElementClassInfo(cl);
for (int i = 0; i < collection.size(); ++i)
{
ValueMetaData vmd = (ValueMetaData) collection.get(i);
result.add(vmd.getValue(elementTypeInfo, cl));
}
return result;
}
public boolean add(Object o)
{
return collection.add(o);
}
public boolean addAll(Collection c)
{
return collection.addAll(c);
}
public void clear()
{
collection.clear();
}
public boolean contains(Object o)
{
return collection.contains(o);
}
public boolean containsAll(Collection c)
{
return collection.containsAll(c);
}
public boolean isEmpty()
{
return collection.isEmpty();
}
public Iterator iterator()
{
return collection.iterator();
}
public boolean remove(Object o)
{
return collection.remove(o);
}
public boolean removeAll(Collection c)
{
return collection.removeAll(c);
}
public boolean retainAll(Collection c)
{
return collection.retainAll(c);
}
public int size()
{
return collection.size();
}
public Object[] toArray()
{
return collection.toArray();
}
public Object[] toArray(Object[] a)
{
return collection.toArray(a);
}
public Iterator getChildren()
{
return collection.iterator();
}
public void toString(JBossStringBuilder buffer)
{
super.toString(buffer);
buffer.append(" collection=");
JBossObject.list(buffer, collection);
}
/**
* Create the default collection instance
*
* @return the class instance
* @throws Throwable for any error
*/
protected Object getDefaultCollectionInstance() throws Throwable
{
return new ArrayList();
}
/**
* Create the collection instance
*
* @param info the request type
* @param cl the classloader
* @param expected the expected class
* @return the class instance
* @throws Throwable for any error
*/
protected Object getCollectionInstance(TypeInfo info, ClassLoader cl, Class expected) throws Throwable
{
TypeInfo typeInfo = getClassInfo(cl);
if (typeInfo != null && typeInfo instanceof ClassInfo == false)
throw new IllegalArgumentException(typeInfo.getName() + " is not a class");
if (typeInfo != null && ((ClassInfo) typeInfo).isInterface())
throw new IllegalArgumentException(typeInfo.getName() + " is an interface");
if (typeInfo == null)
{
// No type specified
if (info == null)
return null;
// Not a class
if (info instanceof ClassInfo == false)
return null;
// Not an interface
if (((ClassInfo) info).isInterface())
return null;
// Type is too general
if (Object.class.getName().equals(info.getName()))
return null;
// Try to use the passed type
typeInfo = info;
}
BeanInfo beanInfo = configurator.getBeanInfo(typeInfo.getType());
Joinpoint constructor = configurator.getConstructorJoinPoint(beanInfo);
Object result = constructor.dispatch();
if (expected.isAssignableFrom(result.getClass()) == false)
throw new ClassCastException(result.getClass() + " is not a " + expected.getName());
return result;
}
/**
* Get the class info for the element type
*
* @param cl the classloader
* @return the class info
* @throws Throwable for any error
*/
protected ClassInfo getElementClassInfo(ClassLoader cl) throws Throwable
{
if (elementType == null)
return null;
return configurator.getClassInfo(elementType, cl);
}
}